I'm am 5'1 and 95-100 lbs when not pregnant. I am small. I have this feeling in the center of my chest in between my breast. it isn't really painful. just feels like pressure and like it needs to pop?!? I feel it all the way thru to the center of my back. I didn't have this with my 1st pregnancy. its kinda freaking me out needless to say but SO says its probably because of how small I am and how big I'm getting. because I am bigger this time then last time. or he said it could be that I pulled something out of place when picking my oldest up who Is 28 lbs. I only feel it when I take a deep breath or if I move just right. if I lay still and breath normal I don't notice it but if I take a deep breath in I feel it.... is this from growing and my rib cage moving to make room like SO thinks or maybe pulled something?